HomeRanfft
Watches
Pink Pages
for Timepieces
.
Home
All Items
Ranfft Items
Brand Shops
Commit an Item
How to do right
Condition of Watches
About Watches
Links
  Help   Log In  Register, Clients   Deutsch  English  EUR  US$  CHF  UKŁ 
 
 
 Index  Timepiece Archive, Categories  Archive: Watch Movements    Timepiece Market 
 
View picture in original size
Fig. 1

View picture in original size
Fig. 2

View picture in original size
Fig. 3

View picture in original size
Fig. 4

Bifora 91/1(SC)

Features
manual wind
sweep second

Data
9.75''', Dm= 21.3mm, Do= 21.7mm
H= 3.4mm
(winding gear +0.4mm)
F= 0.55mm
T= 1.9mm
17 jewels
f = 18000 A/h
power reserve 44h

Balance staff U2912

Stem W2933

Mainspring / battery
Zf665, 1.20 x 8.5 x 0.095 x 265mm

Hands
1.40 x 0.85 x 0.22mm

Comments about the data

Remarks
1964-
in later samples setting lever with pin instead screw, and minute wheel with pin (Fig.3, 4)
these parts can be used for older samples (Fig.1, 2), if the minute-wheel pin is removed from the plate, and/or a modified setting-lever spring is used
signature only Bifora 91, respectively 91/1

family/generations:
9.75''':
91: manual wind, sub second
91(SC): manual wind, sweep second
11.5''':
910: manual wind, sub second
910(SC): manual wind, sweep second
910(CLD): manual wind, sweep second, date
910(AUT): automatic, sweep second
910(AUT-CLD): automatic, sweep second, date
suffix /1: modified setting lever and minute wheel (transition floating)

Example, year: signature; shock device
1-2) ca. 1965: Bifora 91/1; Bifora-Bishock
3-4) ca. 1970: Bifora 91/1, Dugena 2003; Bifora-Bishock

Not for Sale!
The movements presented in this caliber finder are not for sale. This is only a data sheet for identification and evaluation of the movement calibre, as well as for approximate dating.

bidfun-db 21.3 © 02-08-15, mtr-Ranfft


bidfun home
...the alternative - free of charge!
Dr. Roland Ranfft
Erkelenzer Str. 98
41844 Wegberg
Germany
phone +49 (0)2434 6034670

email: info@ranfft.de
.